1249955142 has 16 divisors (see below), whose sum is σ = 2535121152. Its totient is φ = 410783240.

The previous prime is 1249955099. The next prime is 1249955167. The reversal of 1249955142 is 2415599421.

It is a junction number, because it is equal to n+sod(n) for n = 1249955094 and 1249955103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1466658 + ... + 1467509.

It is an arithmetic number, because the mean of its divisors is an integer number (158445072).

Almost surely, 2^1249955142 is an apocalyptic number.

1249955142 is an abundant number, since it is smaller than the sum of its proper divisors (1285166010).

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

1249955142 is a wasteful number, since it uses less digits than its factorization.

1249955142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934243.

The product of its digits is 129600, while the sum is 42.

The square root of 1249955142 is about 35354.7046657160. The cubic root of 1249955142 is about 1077.2044590443.

The spelling of 1249955142 in words is "one billion, two hundred forty-nine million, nine hundred fifty-five thousand, one hundred forty-two".