1187983251 has 48 divisors (see below), whose sum is σ = 2120751360. Its totient is φ = 624024000.

The previous prime is 1187983243. The next prime is 1187983297. The reversal of 1187983251 is 1523897811.

It is not a de Polignac number, because 1187983251 - 2³ = 1187983243 is a prime.

It is a super-2 number, since 2×1187983251² = 2822608409313058002, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1187983197 and 1187983206.

It is not an unprimeable number, because it can be changed into a prime (1187983211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 202680 + ... + 208458.

It is an arithmetic number, because the mean of its divisors is an integer number (44182320).

Almost surely, 2^1187983251 is an apocalyptic number.

1187983251 is a deficient number, since it is larger than the sum of its proper divisors (932768109).

1187983251 is a wasteful number, since it uses less digits than its factorization.

1187983251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6056 (or 6053 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 1187983251 is about 34467.1329094835. The cubic root of 1187983251 is about 1059.0995233182.

The spelling of 1187983251 in words is "one billion, one hundred eighty-seven million, nine hundred eighty-three thousand, two hundred fifty-one".