1371220900 has 135 divisors (see below), whose sum is σ = 3618687009. Its totient is φ = 449692320.

The previous prime is 1371220783. The next prime is 1371220927. The reversal of 1371220900 is 90221731.

The square root of 1371220900 is 37030.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 493639524 + 877581376 = 22218^2 + 29624^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 59618289 + ... + 59618311.

Almost surely, 2^1371220900 is an apocalyptic number.

1371220900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1371220900 is the 37030-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1371220900

1371220900 is an abundant number, since it is smaller than the sum of its proper divisors (2247466109).

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

1371220900 is an frugal number, since it uses more digits than its factorization.

1371220900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 37 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 25.

The cubic root of 1371220900 is about 1110.9703659132.

Multiplying 1371220900 by its sum of digits (25), we get a square (34280522500 = 185150²).

1371220900 divided by its sum of digits (25) gives a square (54848836 = 7406²).

The spelling of 1371220900 in words is "one billion, three hundred seventy-one million, two hundred twenty thousand, nine hundred".