2157470 has 64 divisors (see below), whose sum is σ = 4924800. Its totient is φ = 677376.

The previous prime is 2157457. The next prime is 2157481. The reversal of 2157470 is 747512.

2157470 = T₂₆₅ + T₂₆₆ + ... + T₃₁₅.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58292 + ... + 58328.

It is an arithmetic number, because the mean of its divisors is an integer number (76950).

2^2157470 is an apocalyptic number.

2157470 is an abundant number, since it is smaller than the sum of its proper divisors (2767330).

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

2157470 is a wasteful number, since it uses less digits than its factorization.

2157470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 2157470 is about 1468.8328700026. The cubic root of 2157470 is about 129.2155920567.

The spelling of 2157470 in words is "two million, one hundred fifty-seven thousand, four hundred seventy".