1525320342 has 384 divisors, whose sum is σ = 4804531200. Its totient is φ = 347120640.

The previous prime is 1525320319. The next prime is 1525320347. The reversal of 1525320342 is 2430235251.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1525320347) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 49203867 + ... + 49203897.

It is an arithmetic number, because the mean of its divisors is an integer number (12511800).

Almost surely, 2^1525320342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1525320342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2402265600).

1525320342 is an abundant number, since it is smaller than the sum of its proper divisors (3279210858).

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

1525320342 is a wasteful number, since it uses less digits than its factorization.

1525320342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 1525320342 is about 39055.3497231813. The cubic root of 1525320342 is about 1151.1193491986.

Adding to 1525320342 its reverse (2430235251), we get a palindrome (3955555593).

The spelling of 1525320342 in words is "one billion, five hundred twenty-five million, three hundred twenty thousand, three hundred forty-two".