1525734540 has 72 divisors (see below), whose sum is σ = 5048800848. Its totient is φ = 369874560.

The previous prime is 1525734527. The next prime is 1525734541. The reversal of 1525734540 is 454375251.

1525734540 is a `hidden beast` number, since 1 + 5 + 2 + 573 + 45 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1525734495 and 1525734504.

It is not an unprimeable number, because it can be changed into a prime (1525734541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 383307 + ... + 387266.

It is an arithmetic number, because the mean of its divisors is an integer number (70122234).

Almost surely, 2^1525734540 is an apocalyptic number.

1525734540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1525734540 is an abundant number, since it is smaller than the sum of its proper divisors (3523066308).

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

1525734540 is a wasteful number, since it uses less digits than its factorization.

1525734540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770599 (or 770594 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The square root of 1525734540 is about 39060.6520682899. The cubic root of 1525734540 is about 1151.2235345662.

The spelling of 1525734540 in words is "one billion, five hundred twenty-five million, seven hundred thirty-four thousand, five hundred forty".