1251828342 has 24 divisors (see below), whose sum is σ = 2713226880. Its totient is φ = 417132720.

The previous prime is 1251828323. The next prime is 1251828349. The reversal of 1251828342 is 2438281521.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1251828297 and 1251828306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251828349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50784 + ... + 71292.

It is an arithmetic number, because the mean of its divisors is an integer number (113051120).

Almost surely, 2^1251828342 is an apocalyptic number.

1251828342 is an abundant number, since it is smaller than the sum of its proper divisors (1461398538).

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

1251828342 is a wasteful number, since it uses less digits than its factorization.

1251828342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23908 (or 23905 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 1251828342 is about 35381.1862718027. The cubic root of 1251828342 is about 1077.7422949463.

The spelling of 1251828342 in words is "one billion, two hundred fifty-one million, eight hundred twenty-eight thousand, three hundred forty-two".