1252156320 has 240 divisors, whose sum is σ = 4478664960. Its totient is φ = 329412096.

The previous prime is 1252156319. The next prime is 1252156327. The reversal of 1252156320 is 236512521.

It is a happy number.

1252156320 is a `hidden beast` number, since 1 + 2 + 5 + 21 + 5 + 632 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1252156327) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1023229 + ... + 1024451.

It is an arithmetic number, because the mean of its divisors is an integer number (18661104).

Almost surely, 2^1252156320 is an apocalyptic number.

1252156320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1252156320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2239332480).

1252156320 is an abundant number, since it is smaller than the sum of its proper divisors (3226508640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1252156320 is a wasteful number, since it uses less digits than its factorization.

1252156320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329 (or 1312 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1252156320 is about 35385.8208891641. The cubic root of 1252156320 is about 1077.8364092602.

Adding to 1252156320 its reverse (236512521), we get a palindrome (1488668841).

The spelling of 1252156320 in words is "one billion, two hundred fifty-two million, one hundred fifty-six thousand, three hundred twenty".