1401626155 has 4 divisors (see below), whose sum is σ = 1681951392. Its totient is φ = 1121300920.

The previous prime is 1401626129. The next prime is 1401626209. The reversal of 1401626155 is 5516261041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5516261041 = 53 ⋅104080397.

It is not a de Polignac number, because 1401626155 - 2²⁷ = 1267408427 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140162611 + ... + 140162620.

It is an arithmetic number, because the mean of its divisors is an integer number (420487848).

Almost surely, 2^1401626155 is an apocalyptic number.

1401626155 is a deficient number, since it is larger than the sum of its proper divisors (280325237).

1401626155 is an equidigital number, since it uses as much as digits as its factorization.

1401626155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280325236.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 1401626155 is about 37438.2979714623. The cubic root of 1401626155 is about 1119.1219082072.

Adding to 1401626155 its reverse (5516261041), we get a palindrome (6917887196).

The spelling of 1401626155 in words is "one billion, four hundred one million, six hundred twenty-six thousand, one hundred fifty-five".