102457220 has 24 divisors (see below), whose sum is σ = 217382424. Its totient is φ = 40559616.

The previous prime is 102457219. The next prime is 102457297. The reversal of 102457220 is 22754201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 891136 + 101566084 = 944^2 + 10078^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24467 + ... + 28346.

It is an arithmetic number, because the mean of its divisors is an integer number (9057601).

Almost surely, 2^102457220 is an apocalyptic number.

102457220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102457220 is an abundant number, since it is smaller than the sum of its proper divisors (114925204).

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

102457220 is a wasteful number, since it uses less digits than its factorization.

102457220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52919 (or 52917 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 102457220 is about 10122.1153915572. The cubic root of 102457220 is about 467.9299637081.

The spelling of 102457220 in words is "one hundred two million, four hundred fifty-seven thousand, two hundred twenty".