1047209157 has 12 divisors (see below), whose sum is σ = 1514021184. Its totient is φ = 697499880.

The previous prime is 1047209131. The next prime is 1047209213. The reversal of 1047209157 is 7519027401.

It is a happy number.

It is not a de Polignac number, because 1047209157 - 2⁸ = 1047208901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1047209117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42819 + ... + 62672.

It is an arithmetic number, because the mean of its divisors is an integer number (126168432).

Almost surely, 2^1047209157 is an apocalyptic number.

It is an amenable number.

1047209157 is a deficient number, since it is larger than the sum of its proper divisors (466812027).

1047209157 is a wasteful number, since it uses less digits than its factorization.

1047209157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106600 (or 106597 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 1047209157 is about 32360.6111963294. The cubic root of 1047209157 is about 1015.4950490200.

The spelling of 1047209157 in words is "one billion, forty-seven million, two hundred nine thousand, one hundred fifty-seven".