1881253457 has 4 divisors (see below), whose sum is σ = 1883644656. Its totient is φ = 1878862260.

The previous prime is 1881253447. The next prime is 1881253459. The reversal of 1881253457 is 7543521881.

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.

It is a cyclic number.

It is not a de Polignac number, because 1881253457 - 2¹² = 1881249361 is a prime.

It is a super-2 number, since 2×1881253457² = 7078229138948901698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1881253459) 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, 1194419 + ... + 1195992.

It is an arithmetic number, because the mean of its divisors is an integer number (470911164).

Almost surely, 2^1881253457 is an apocalyptic number.

It is an amenable number.

1881253457 is a deficient number, since it is larger than the sum of its proper divisors (2391199).

1881253457 is an equidigital number, since it uses as much as digits as its factorization.

1881253457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391198.

The product of its digits is 268800, while the sum is 44.

The square root of 1881253457 is about 43373.4187838589. The cubic root of 1881253457 is about 1234.4753916038.

The spelling of 1881253457 in words is "one billion, eight hundred eighty-one million, two hundred fifty-three thousand, four hundred fifty-seven".