1525421712 has 40 divisors (see below), whose sum is σ = 4067795200. Its totient is φ = 492071040.

The previous prime is 1525421699. The next prime is 1525421717. The reversal of 1525421712 is 2171245251.

It is a happy number.

It is a super-2 number, since 2×1525421712² = 4653822798882021888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1525421712.

It is not an unprimeable number, because it can be changed into a prime (1525421717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511087 + ... + 514062.

It is an arithmetic number, because the mean of its divisors is an integer number (101694880).

Almost surely, 2^1525421712 is an apocalyptic number.

1525421712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1525421712 is an abundant number, since it is smaller than the sum of its proper divisors (2542373488).

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

1525421712 is a wasteful number, since it uses less digits than its factorization.

1525421712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025191 (or 1025185 counting only the distinct ones).

The product of its digits is 5600, while the sum is 30.

The square root of 1525421712 is about 39056.6474751738. The cubic root of 1525421712 is about 1151.1448490625.

Adding to 1525421712 its reverse (2171245251), we get a palindrome (3696666963).

The spelling of 1525421712 in words is "one billion, five hundred twenty-five million, four hundred twenty-one thousand, seven hundred twelve".