1296372020 has 54 divisors (see below), whose sum is σ = 2784277062. Its totient is φ = 507019776.

The previous prime is 1296371983. The next prime is 1296372029. The reversal of 1296372020 is 202736921.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 92698384 + 1203673636 = 9628^2 + 34694^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296372029) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 13364612 + ... + 13364708.

Almost surely, 2^1296372020 is an apocalyptic number.

1296372020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1296372020 is an abundant number, since it is smaller than the sum of its proper divisors (1487905042).

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

1296372020 is an frugal number, since it uses more digits than its factorization.

1296372020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 1296372020 is about 36005.1665737016. The cubic root of 1296372020 is about 1090.3766675095.

The spelling of 1296372020 in words is "one billion, two hundred ninety-six million, three hundred seventy-two thousand, twenty".