1025451881 has 2 divisors, whose sum is σ = 1025451882. Its totient is φ = 1025451880.

The previous prime is 1025451877. The next prime is 1025451913. The reversal of 1025451881 is 1881545201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1003875856 + 21576025 = 31684^2 + 4645^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025451881 - 2² = 1025451877 is a prime.

It is a super-2 number, since 2×1025451881² = 2103103120492876322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1025451811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512725940 + 512725941.

It is an arithmetic number, because the mean of its divisors is an integer number (512725941).

Almost surely, 2^1025451881 is an apocalyptic number.

It is an amenable number.

1025451881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025451881 is an equidigital number, since it uses as much as digits as its factorization.

1025451881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12800, while the sum is 35.

The square root of 1025451881 is about 32022.6776050973. The cubic root of 1025451881 is about 1008.4129835555.

The spelling of 1025451881 in words is "one billion, twenty-five million, four hundred fifty-one thousand, eight hundred eighty-one".