1407231157 has 2 divisors, whose sum is σ = 1407231158. Its totient is φ = 1407231156.

The previous prime is 1407231139. The next prime is 1407231223. The reversal of 1407231157 is 7511327041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 815330916 + 591900241 = 28554^2 + 24329^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1407231157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1407231107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 703615578 + 703615579.

It is an arithmetic number, because the mean of its divisors is an integer number (703615579).

Almost surely, 2^1407231157 is an apocalyptic number.

It is an amenable number.

1407231157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1407231157 is an equidigital number, since it uses as much as digits as its factorization.

1407231157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 1407231157 is about 37513.0798122468. The cubic root of 1407231157 is about 1120.6116867536.

Adding to 1407231157 its reverse (7511327041), we get a palindrome (8918558198).

The spelling of 1407231157 in words is "one billion, four hundred seven million, two hundred thirty-one thousand, one hundred fifty-seven".