1250420401 has 4 divisors (see below), whose sum is σ = 1250550000. Its totient is φ = 1250290804.

The previous prime is 1250420389. The next prime is 1250420411. The reversal of 1250420401 is 1040240521.

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 1250420401 - 2¹¹ = 1250418353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1250420411) 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, 49051 + ... + 70048.

It is an arithmetic number, because the mean of its divisors is an integer number (312637500).

Almost surely, 2^1250420401 is an apocalyptic number.

It is an amenable number.

1250420401 is a deficient number, since it is larger than the sum of its proper divisors (129599).

1250420401 is a wasteful number, since it uses less digits than its factorization.

1250420401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129598.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1250420401 is about 35361.2839274820. The cubic root of 1250420401 is about 1077.3380950131.

Adding to 1250420401 its reverse (1040240521), we get a palindrome (2290660922).

The spelling of 1250420401 in words is "one billion, two hundred fifty million, four hundred twenty thousand, four hundred one".