142451690 has 16 divisors (see below), whose sum is σ = 262376928. Its totient is φ = 55655376.

The previous prime is 142451681. The next prime is 142451693. The reversal of 142451690 is 96154241.

It is a super-2 number, since 2×142451690² = 40584967967712200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142451693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165212 + ... + 166071.

It is an arithmetic number, because the mean of its divisors is an integer number (16398558).

Almost surely, 2^142451690 is an apocalyptic number.

142451690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

142451690 is a deficient number, since it is larger than the sum of its proper divisors (119925238).

142451690 is a wasteful number, since it uses less digits than its factorization.

142451690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331333.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 142451690 is about 11935.3127315542. The cubic root of 142451690 is about 522.2629313033.

The spelling of 142451690 in words is "one hundred forty-two million, four hundred fifty-one thousand, six hundred ninety".