1251401 has 4 divisors (see below), whose sum is σ = 1253904. Its totient is φ = 1248900.

The previous prime is 1251329. The next prime is 1251409. The reversal of 1251401 is 1041521.

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 a de Polignac number, because none of the positive numbers 2^k-1251401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (1251409) 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, 215 + ... + 1596.

It is an arithmetic number, because the mean of its divisors is an integer number (313476).

2^1251401 is an apocalyptic number.

It is an amenable number.

1251401 is a deficient number, since it is larger than the sum of its proper divisors (2503).

1251401 is an equidigital number, since it uses as much as digits as its factorization.

1251401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2502.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 1251401 is about 1118.6603595372. The cubic root of 1251401 is about 107.7619643155.

Adding to 1251401 its reverse (1041521), we get a palindrome (2292922).

The spelling of 1251401 in words is "one million, two hundred fifty-one thousand, four hundred one".