251421041 has 12 divisors (see below), whose sum is σ = 267679440. Its totient is φ = 236101440.

The previous prime is 251421019. The next prime is 251421089. The reversal of 251421041 is 140124152.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-251421041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251451041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 199070 + ... + 200328.

It is an arithmetic number, because the mean of its divisors is an integer number (22306620).

Almost surely, 2^251421041 is an apocalyptic number.

It is an amenable number.

251421041 is a deficient number, since it is larger than the sum of its proper divisors (16258399).

251421041 is a wasteful number, since it uses less digits than its factorization.

251421041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984 (or 1967 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 251421041 is about 15856.2618860815. The cubic root of 251421041 is about 631.1518701692.

Adding to 251421041 its reverse (140124152), we get a palindrome (391545193).

The spelling of 251421041 in words is "two hundred fifty-one million, four hundred twenty-one thousand, forty-one".