1270621 has 6 divisors (see below), whose sum is σ = 1396766. Its totient is φ = 1155000.

The previous prime is 1270609. The next prime is 1270627. The reversal of 1270621 is 1260721.

It can be written as a sum of positive squares in only one way, i.e., 980100 + 290521 = 990^2 + 539^2 .

It is not a de Polignac number, because 1270621 - 2¹⁵ = 1237853 is a prime.

It is a super-2 number, since 2×1270621² = 3228955451282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1270627) 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, 5130 + ... + 5371.

2^1270621 is an apocalyptic number.

1270621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1270621 is a deficient number, since it is larger than the sum of its proper divisors (126145).

1270621 is a wasteful number, since it uses less digits than its factorization.

1270621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10523 (or 10512 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 1270621 is about 1127.2182574817. The cubic root of 1270621 is about 108.3108613481.

It can be divided in two parts, 1270 and 621, that added together give a triangular number (1891 = T₆₁).

The spelling of 1270621 in words is "one million, two hundred seventy thousand, six hundred twenty-one".