1297677240 has 64 divisors (see below), whose sum is σ = 4325594400. Its totient is φ = 346046976.

The previous prime is 1297677229. The next prime is 1297677247. The reversal of 1297677240 is 427767921.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297677247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 599697 + ... + 601856.

Almost surely, 2^1297677240 is an apocalyptic number.

1297677240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1297677240 is an abundant number, since it is smaller than the sum of its proper divisors (3027917160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1297677240 is a wasteful number, since it uses less digits than its factorization.

1297677240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201573 (or 1201563 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The square root of 1297677240 is about 36023.2874679699. The cubic root of 1297677240 is about 1090.7424843294.

The spelling of 1297677240 in words is "one billion, two hundred ninety-seven million, six hundred seventy-seven thousand, two hundred forty".