1621265032 has 32 divisors (see below), whose sum is σ = 3274375680. Its totient is φ = 750372480.

The previous prime is 1621264961. The next prime is 1621265033. The reversal of 1621265032 is 2305621261.

It is a super-2 number, since 2×1621265032² = 5257000607971922048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1621265033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136413 + ... + 147820.

It is an arithmetic number, because the mean of its divisors is an integer number (102324240).

Almost surely, 2^1621265032 is an apocalyptic number.

It is an amenable number.

1621265032 is an abundant number, since it is smaller than the sum of its proper divisors (1653110648).

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

1621265032 is a wasteful number, since it uses less digits than its factorization.

1621265032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284293 (or 284289 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1621265032 is about 40264.9355146634. The cubic root of 1621265032 is about 1174.7659185426.

Adding to 1621265032 its reverse (2305621261), we get a palindrome (3926886293).

The spelling of 1621265032 in words is "one billion, six hundred twenty-one million, two hundred sixty-five thousand, thirty-two".