1245137031 has 6 divisors (see below), whose sum is σ = 1798531280. Its totient is φ = 830091348.

The previous prime is 1245136973. The next prime is 1245137071. The reversal of 1245137031 is 1307315421.

It is not a de Polignac number, because 1245137031 - 2¹¹ = 1245134983 is a prime.

It is a super-2 number, since 2×1245137031² = 3100732451934989922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1245136986 and 1245137004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245137071) 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, 69174271 + ... + 69174288.

Almost surely, 2^1245137031 is an apocalyptic number.

1245137031 is a deficient number, since it is larger than the sum of its proper divisors (553394249).

1245137031 is a wasteful number, since it uses less digits than its factorization.

1245137031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138348565 (or 138348562 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 1245137031 is about 35286.4992738016. The cubic root of 1245137031 is about 1075.8186030197.

The spelling of 1245137031 in words is "one billion, two hundred forty-five million, one hundred thirty-seven thousand, thirty-one".