1402641157 has 4 divisors (see below), whose sum is σ = 1418401260. Its totient is φ = 1386881056.

The previous prime is 1402641133. The next prime is 1402641167. The reversal of 1402641157 is 7511462041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7511462041 = 97 ⋅77437753.

It can be written as a sum of positive squares in 2 ways, for example, as 907756641 + 494884516 = 30129^2 + 22246^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1402641157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1402641167) 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, 7879918 + ... + 7880095.

It is an arithmetic number, because the mean of its divisors is an integer number (354600315).

Almost surely, 2^1402641157 is an apocalyptic number.

It is an amenable number.

1402641157 is a deficient number, since it is larger than the sum of its proper divisors (15760103).

1402641157 is an equidigital number, since it uses as much as digits as its factorization.

1402641157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15760102.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 1402641157 is about 37451.8511825517. The cubic root of 1402641157 is about 1119.3919842393.

The spelling of 1402641157 in words is "one billion, four hundred two million, six hundred forty-one thousand, one hundred fifty-seven".