1251450420 has 96 divisors (see below), whose sum is σ = 3833464320. Its totient is φ = 302520960.

The previous prime is 1251450413. The next prime is 1251450433. The reversal of 1251450420 is 240541521.

1251450420 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×1251450420³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 247639 + ... + 252641.

It is an arithmetic number, because the mean of its divisors is an integer number (39931920).

Almost surely, 2^1251450420 is an apocalyptic number.

1251450420 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 1251450420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1916732160).

1251450420 is an abundant number, since it is smaller than the sum of its proper divisors (2582013900).

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

1251450420 is a wasteful number, since it uses less digits than its factorization.

1251450420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5405 (or 5403 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 1251450420 is about 35375.8451489148. The cubic root of 1251450420 is about 1077.6338286589.

Adding to 1251450420 its reverse (240541521), we get a palindrome (1491991941).

The spelling of 1251450420 in words is "one billion, two hundred fifty-one million, four hundred fifty thousand, four hundred twenty".