71222025 has 24 divisors (see below), whose sum is σ = 134576704. Its totient is φ = 32558400.

The previous prime is 71222023. The next prime is 71222029. The reversal of 71222025 is 52022217.

It is a happy number.

It is not a de Polignac number, because 71222025 - 2¹ = 71222023 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 71221992 and 71222010.

It is not an unprimeable number, because it can be changed into a prime (71222023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67306 + ... + 68355.

Almost surely, 2^71222025 is an apocalyptic number.

71222025 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

71222025 is a deficient number, since it is larger than the sum of its proper divisors (63354679).

71222025 is a wasteful number, since it uses less digits than its factorization.

71222025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135681 (or 135676 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 71222025 is about 8439.3142493925. The cubic root of 71222025 is about 414.5129525962.

The spelling of 71222025 in words is "seventy-one million, two hundred twenty-two thousand, twenty-five".