249142906 has 4 divisors (see below), whose sum is σ = 373714362. Its totient is φ = 124571452.

The previous prime is 249142897. The next prime is 249142913. The reversal of 249142906 is 609241942.

It is a happy number.

249142906 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 137100681 + 112042225 = 11709^2 + 10585^2 .

It is a super-2 number, since 2×249142906² = 124144375220249672, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62285725 + ... + 62285728.

Almost surely, 2^249142906 is an apocalyptic number.

249142906 is a deficient number, since it is larger than the sum of its proper divisors (124571456).

249142906 is a wasteful number, since it uses less digits than its factorization.

249142906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124571455.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 249142906 is about 15784.2613384346. The cubic root of 249142906 is about 629.2397868169.

The spelling of 249142906 in words is "two hundred forty-nine million, one hundred forty-two thousand, nine hundred six".