1406552157 has 6 divisors (see below), whose sum is σ = 2031686462. Its totient is φ = 937701432.

The previous prime is 1406552149. The next prime is 1406552179. The reversal of 1406552157 is 7512556041.

It can be written as a sum of positive squares in only one way, i.e., 878885316 + 527666841 = 29646^2 + 22971^2 .

It is not a de Polignac number, because 1406552157 - 2³ = 1406552149 is a prime.

It is a super-2 number, since 2×1406552157² = 3956777940722705298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1406550157) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78141778 + ... + 78141795.

Almost surely, 2^1406552157 is an apocalyptic number.

It is an amenable number.

1406552157 is a deficient number, since it is larger than the sum of its proper divisors (625134305).

1406552157 is a wasteful number, since it uses less digits than its factorization.

1406552157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156283579 (or 156283576 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The square root of 1406552157 is about 37504.0285436112. The cubic root of 1406552157 is about 1120.4314231337.

The spelling of 1406552157 in words is "one billion, four hundred six million, five hundred fifty-two thousand, one hundred fifty-seven".