1525377420 has 120 divisors (see below), whose sum is σ = 5468801184. Its totient is φ = 348655104.

The previous prime is 1525377401. The next prime is 1525377431. The reversal of 1525377420 is 247735251.

1525377420 is a `hidden beast` number, since 1 + 52 + 537 + 74 + 2 + 0 = 666.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 55917 + ... + 78596.

Almost surely, 2^1525377420 is an apocalyptic number.

1525377420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1525377420 is an abundant number, since it is smaller than the sum of its proper divisors (3943423764).

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

1525377420 is a wasteful number, since it uses less digits than its factorization.

1525377420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134541 (or 134530 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

The square root of 1525377420 is about 39056.0804485038. The cubic root of 1525377420 is about 1151.1337074439.

The spelling of 1525377420 in words is "one billion, five hundred twenty-five million, three hundred seventy-seven thousand, four hundred twenty".