1025377251 has 4 divisors (see below), whose sum is σ = 1367169672. Its totient is φ = 683584832.

The previous prime is 1025377231. The next prime is 1025377289. The reversal of 1025377251 is 1527735201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1527735201 = 3 ⋅509245067.

It is a cyclic number.

It is not a de Polignac number, because 1025377251 - 2⁶ = 1025377187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1025377201) 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, 170896206 + ... + 170896211.

It is an arithmetic number, because the mean of its divisors is an integer number (341792418).

Almost surely, 2^1025377251 is an apocalyptic number.

1025377251 is a deficient number, since it is larger than the sum of its proper divisors (341792421).

1025377251 is an equidigital number, since it uses as much as digits as its factorization.

1025377251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341792420.

The product of its (nonzero) digits is 14700, while the sum is 33.

The square root of 1025377251 is about 32021.5123159416. The cubic root of 1025377251 is about 1008.3885196458.

The spelling of 1025377251 in words is "one billion, twenty-five million, three hundred seventy-seven thousand, two hundred fifty-one".