1401600251 has 4 divisors (see below), whose sum is σ = 1409430600. Its totient is φ = 1393769904.

The previous prime is 1401600223. The next prime is 1401600281. The reversal of 1401600251 is 1520061041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1401600251 - 2²⁶ = 1334491387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1401600281) 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, 3914906 + ... + 3915263.

It is an arithmetic number, because the mean of its divisors is an integer number (352357650).

Almost surely, 2^1401600251 is an apocalyptic number.

1401600251 is a deficient number, since it is larger than the sum of its proper divisors (7830349).

1401600251 is an equidigital number, since it uses as much as digits as its factorization.

1401600251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7830348.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1401600251 is about 37437.9520139657. The cubic root of 1401600251 is about 1119.1150138551.

Adding to 1401600251 its reverse (1520061041), we get a palindrome (2921661292).

The spelling of 1401600251 in words is "one billion, four hundred one million, six hundred thousand, two hundred fifty-one".