157021012 has 6 divisors (see below), whose sum is σ = 274786778. Its totient is φ = 78510504.

The previous prime is 157020989. The next prime is 157021013. The reversal of 157021012 is 210120751.

It can be written as a sum of positive squares in only one way, i.e., 95335696 + 61685316 = 9764^2 + 7854^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157021013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19627623 + ... + 19627630.

Almost surely, 2^157021012 is an apocalyptic number.

It is an amenable number.

157021012 is a deficient number, since it is larger than the sum of its proper divisors (117765766).

157021012 is a wasteful number, since it uses less digits than its factorization.

157021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39255257 (or 39255255 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 157021012 is about 12530.8025281703. The cubic root of 157021012 is about 539.4931366430.

Adding to 157021012 its reverse (210120751), we get a palindrome (367141763).

The spelling of 157021012 in words is "one hundred fifty-seven million, twenty-one thousand, twelve".