61570245 has 24 divisors (see below), whose sum is σ = 108285408. Its totient is φ = 29851360.

The previous prime is 61570213. The next prime is 61570273. The reversal of 61570245 is 54207516.

It is not a de Polignac number, because 61570245 - 2⁵ = 61570213 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15147 + ... + 18776.

It is an arithmetic number, because the mean of its divisors is an integer number (4511892).

Almost surely, 2^61570245 is an apocalyptic number.

It is an amenable number.

61570245 is a deficient number, since it is larger than the sum of its proper divisors (46715163).

61570245 is a wasteful number, since it uses less digits than its factorization.

61570245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33953 (or 33942 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 61570245 is about 7846.6709501546. The cubic root of 61570245 is about 394.8725647770.

The spelling of 61570245 in words is "sixty-one million, five hundred seventy thousand, two hundred forty-five".