1901396025 has 189 divisors, whose sum is σ = 3963192861. Its totient is φ = 904193280.

The previous prime is 1901395999. The next prime is 1901396053. The reversal of 1901396025 is 5206931091.

The square root of 1901396025 is 43605.

It is a perfect power (a square), and thus also a powerful number.

1901396025 is a `hidden beast` number, since 19 + 0 + 1 + 39 + 602 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 44475561 + 1856920464 = 6669^2 + 43092^2 .

It is not a de Polignac number, because 1901396025 - 2⁹ = 1901395513 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 188 ways as a sum of consecutive naturals, for example, 100073466 + ... + 100073484.

Almost surely, 2^1901396025 is an apocalyptic number.

1901396025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1901396025 is the 43605-th square number.

1901396025 is the 21803-rd centered octagonal number.

It is an amenable number.

1901396025 is an abundant number, since it is smaller than the sum of its proper divisors (2061796836).

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

1901396025 is an equidigital number, since it uses as much as digits as its factorization.

1901396025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The cubic root of 1901396025 is about 1238.8655999236.

Multiplying 1901396025 by its sum of digits (36), we get a square (68450256900 = 261630²).

The spelling of 1901396025 in words is "one billion, nine hundred one million, three hundred ninety-six thousand, twenty-five".