1252001142 has 96 divisors (see below), whose sum is σ = 3291492672. Its totient is φ = 335757312.

The previous prime is 1252001131. The next prime is 1252001167. The reversal of 1252001142 is 2411002521.

1252001142 is a `hidden beast` number, since 1 + 2 + 520 + 0 + 1 + 142 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1235428 + ... + 1236440.

It is an arithmetic number, because the mean of its divisors is an integer number (34286382).

Almost surely, 2^1252001142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1252001142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1645746336).

1252001142 is an abundant number, since it is smaller than the sum of its proper divisors (2039491530).

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

1252001142 is a wasteful number, since it uses less digits than its factorization.

1252001142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622 (or 1619 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1252001142 is about 35383.6281633187. The cubic root of 1252001142 is about 1077.7918824959.

Adding to 1252001142 its reverse (2411002521), we get a palindrome (3663003663).

The spelling of 1252001142 in words is "one billion, two hundred fifty-two million, one thousand, one hundred forty-two".