1925361281 has 4 divisors (see below), whose sum is σ = 1925459712. Its totient is φ = 1925262852.

The previous prime is 1925361253. The next prime is 1925361323. The reversal of 1925361281 is 1821635291.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1821635291 = 7 ⋅260233613.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1925361281 is a prime.

It is a super-2 number, since 2×1925361281² = 7414032124747921922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1925361241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8825 + ... + 62678.

It is an arithmetic number, because the mean of its divisors is an integer number (481364928).

Almost surely, 2^1925361281 is an apocalyptic number.

It is an amenable number.

1925361281 is a deficient number, since it is larger than the sum of its proper divisors (98431).

1925361281 is an equidigital number, since it uses as much as digits as its factorization.

1925361281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98430.

The product of its digits is 25920, while the sum is 38.

The square root of 1925361281 is about 43878.9389229047. The cubic root of 1925361281 is about 1244.0487846740.

The spelling of 1925361281 in words is "one billion, nine hundred twenty-five million, three hundred sixty-one thousand, two hundred eighty-one".