39121557 has 16 divisors (see below), whose sum is σ = 53264448. Its totient is φ = 25534080.

The previous prime is 39121553. The next prime is 39121561. The reversal of 39121557 is 75512193.

39121557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (39121553) and next prime (39121561).

It is not a de Polignac number, because 39121557 - 2² = 39121553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39121553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56938 + ... + 57620.

It is an arithmetic number, because the mean of its divisors is an integer number (3329028).

Almost surely, 2^39121557 is an apocalyptic number.

It is an amenable number.

39121557 is a deficient number, since it is larger than the sum of its proper divisors (14142891).

39121557 is a wasteful number, since it uses less digits than its factorization.

39121557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060.

The product of its digits is 9450, while the sum is 33.

The square root of 39121557 is about 6254.7227756312. The cubic root of 39121557 is about 339.4731083598.

The spelling of 39121557 in words is "thirty-nine million, one hundred twenty-one thousand, five hundred fifty-seven".