74640025 has 6 divisors (see below), whose sum is σ = 92553662. Its totient is φ = 59712000.

The previous prime is 74640019. The next prime is 74640029. The reversal of 74640025 is 52004647.

It can be written as a sum of positive squares in 3 ways, for example, as 6031936 + 68608089 = 2456^2 + 8283^2 .

It is not a de Polignac number, because 74640025 - 2¹¹ = 74637977 is a prime.

It is a super-2 number, since 2×74640025² = 11142266664001250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74639975 and 74640002.

It is not an unprimeable number, because it can be changed into a prime (74640029) 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, 1492776 + ... + 1492825.

Almost surely, 2^74640025 is an apocalyptic number.

It is an amenable number.

74640025 is a deficient number, since it is larger than the sum of its proper divisors (17913637).

74640025 is a wasteful number, since it uses less digits than its factorization.

74640025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2985611 (or 2985606 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 74640025 is about 8639.4458734342. The cubic root of 74640025 is about 421.0405510446.

The spelling of 74640025 in words is "seventy-four million, six hundred forty thousand, twenty-five".